Description
Rifle Scope Product Details
Butler Creek Flip-Open Scope Cover and Butler Creek Flip-Open Eyepiece Scope Cover, Size 18 (1.7-Inch, 43.2mm)
Rifle Scope Product Features
Performs from -40 to 120 Degrees F weighs less than an ounce
When measuring your scope, it is critical to measure the outside diameter of the scope bell, See Scope Cover Guide for proper fit with your scope under product description. Refer tertiary image for size chart and product details for sizing guide
Truly ambidextrous, silent spring hinges won’t spook game
Instant action lids pop open at the touch of a thumb
About the Butler Creek Manufacturer
Butler Creek is a premium company for rifle scopes, optics, mounting solutions, and other components used for guns like rifles and long guns. They style and build their scopes and related products by choosing building materials which are resilient and long lasting. This includes the Butler Creek Flip-Open Scope Cover and Butler Creek Flip-Open Eyepiece Scope Cover, Size 18 (1.7-Inch, 43.2mm) by Butler Creek. For additional shooting items, visit their website.
Glass Info
Rifle scopes permit you to exactly align a rifle at different targets by aligning your eye with the target over a range. They accomplish this through magnifying the target by utilizing a set of lenses inside the scope. The scope’s positioning can be dialed in for consideration of numerous ecological considerations like wind and elevation decreases to make up for bullet drop.
The scope’s function is to understand precisely where the bullet will land based on the sight picture you are viewing with the optic as you align the scope’s crosshair or reticle with the target. The majority of modern rifle scopes have around eleven parts which are found inside and outside of the scope. These scope parts consist of the rifle scope’s body, lenses, elevation turrets, focus rings, and other parts. Learn about the eleven parts of rifle optics.
Rifle Scope Types
Rifle scopes can be either “first focal plane” or “second focal plane” kind of scopes. The form of focal plane an optic has decides where the reticle or crosshair lies in connection with the optic’s magnifying adjustments. It simply indicates the reticle is situated behind or ahead of the magnification lens of the scope. Considering the very best kind of rifle scope is based upon what sort of shooting you plan on doing.
First Focal Plane Optic Facts
First focal plane optics (FFP) come with the reticle ahead of the zoom lens. This induces the reticle to increase in size based upon the amount of magnification being used. The result is that the reticle measurements are the same at the amplified distance as they are at the non amplified range. One tick on a mil-dot reticle at one hundred yards without “zoom” is still the very same tick at 100 yards by using 5x “zoom”. These types of scopes work for:
- Quick acquisition, long distance kinds of shooting
- Shooting situations where estimations are very little
- Experienced shooters who have an idea for their aim point “hold over” and “lead” relationships for their rifles
- Shooters who do not mind the reticle is enlarged and uses up more visual eyesight area than a SFP reticle
Second Focal Plane Scopes
Second focal plane optics (SFP) feature the reticle behind the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick would be 1/5th of the non “zoom” tick measurement.
- Long distance forms of shooting where shooters have increased time to make ballistic computations
- Shooting where most shots happen within shorter ranges and proximities
- Shooters who want a clearer optic picture with less space used up by the larger size FFP reticle
Optic Zoom
The level of scope magnification you need on your glass depends on the kind of shooting you would like to do. Virtually every style of rifle scope offers some level of magnification. The volume of magnification a scope delivers is identified by the diameter, density, and curvatures of the lenses within the rifle scope. The magnifying level of the optic is the “power” of the scope. This means what the shooter is observing through the scope is magnified times the power aspect of what can generally be seen by human eyes.
Info About Fixed Single Power Lens Optics
A single power rifle scope will have a magnification number designator like 4×32. This suggests the magnification power of the scope is 4x power and the objective lens is 32mm. The magnification of this kind of scope can not adjust because it is a fixed power optic.
Adjustable Power Lens Optics
Variable power rifle scopes can be changed between magnification power levels. These types of scopes will note the zoom level in a configuration like 2-10×32. These numbers mean the magnification of the scope could be changed in between 2x and 10x power. This additionally includes the powers in-between 2 and 10. The power adjustment is achieved utilizing the power ring part of the scope near the rear of the scope by the eye bell piece.
The Power Level and Range of Scopes
Here are some recommended scope power levels and the ranges where they can be efficiently used. Highly magnified optics will not be as beneficial as lower magnification glass considering that too much zoom can be a bad thing. The same concept applies to longer ranges where the shooter needs to have enough power to see exactly where to best aim the rifle at the target.
Lens Finish for Rifle Glass
All modern-day rifle scope and optic lenses are layered. Lens finishing is an important element of a shooting system when looking into high end rifle optics and scope systems.
HD Versus ED Lenses
Some glass companies additionally use “HD” or high-definition lens finishings which use different procedures, aspects, polarizations, and chemicals to draw out various colors and viewable target definition through the lens. This HD finish is typically used with greater density lens glass which drops light’s potential to refract through the lens glass. Some scope vendors use “HD” to describe “ED” suggesting extra-low dispersion glass. ED deals with how colors are presented on the chroma spectrum and the chromatic aberration which is also called color distortion or fringing. Chromatic aberration can be noticeable over things with hard outlines as light hits the item from particular angles.
Single Rifle Scope Lens Finish Versus Multi-Coating
Different optic lenses can also have different coverings applied to them. All lenses generally have at least some type of treatment or finishing applied to them prior to being used in a rifle scope or optic. Because the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It becomes part of the carefully tuned optic. It needs to have a finish applied to it so that the lens will be optimally functional in numerous types of environments, degrees of sunlight (full light VS shaded), and other shooting conditions.
Single coated lenses have a treatment applied to them which is normally a protective and boosting multi-purpose treatment. This lens treatment can shield the lens from scratches while minimizing glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope manufacturer and just how much you spent for it. Both are signs of the lens quality.
Some scope manufacturers similarly make it a point to define if their optic lenses are covered or “multi” covered. Being “better” depends on the manufacturer’s lens treatment technology and the quality of materials used in constructing the rifle scope.
Hydrophobic Lens Finish
Water on a scope lens does not support retaining a clear sight picture through an optic whatsoever. Lots of top of the line and high-end optic manufacturers will coat their lenses with a hydrophilic or hydrophobic finishing. The Steiner Optics Nano-Protection is a fine example of this kind of treatment. It treats the exterior of the Steiner optic lens so the water molecules can not bind to it or produce surface tension. The outcome is that the water beads slide off of the scope to maintain a clear, water free sight picture.
Choices for Mounting Optics on Firearms
Mounting approaches for scopes are available in a few choices. There are the basic scope rings which are separately installed to the scope and one-piece scope mounts which cradle the scope. These different kinds of mounts also typically can be found in quick release versions which use manual levers which allow rifle operators to quickly mount and remove the glass.
Hex Key Optic Rings
Basic, clamp style mounting optic rings use hex head screws to position to the flattop style Picatinny scope mounting rails on the tops of rifles. These styles of scope mounts use a pair of detached rings to support the scope, and are usually constructed from 7075 T6 billet aluminum which are developed for long distance precision shooting. This type of scope mount is effective for rifle systems which need to have a long lasting, rock solid mount which will not change no matter how much the scope is moved about or jarring the rifle takes. These are the type of mounts you want for a specialized optics setup on a far away scouting or tournament long gun which will seldom need to be altered or adjusted. Blue 242 Loctite threadlocker can additionally be used on screws to keep the hex screw threads from wiggling out after they are mounted safely in place. An example of these rings are the 30mm type from the Vortex Optics company. The set normally costs around $200 USD
Scope Mounts with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to quickly take off a scope from a rifle and reattach it to a different rifle. If they all use a similar style mount, several scopes can often be switched in the field. The quick detach mount style is CNC machined from anodized 6061 T6 aluminum and the mounting levers attach nicely to a flat top style Picatinny rail. This enables the scope to be sighted in while on the rifle, removed from the rifle, and remounted while retaining accuracy. These kinds of mounts are useful and handy for rifles which are transferred a lot, to take off the scope from the rifle for protection, or for scopes which are chosen for use in between multiple rifles. An example of this mount type is the 30mm mount from the Vortex Optics brand. It generally costs around $250 USD
Info on Rifle Glass Tube Sealing and Gas Purging
Wetness inside your rifle scope can destroy a day of shooting and your costly optic by bringing about fogging and producing residue inside of the scope tube. A lot of scopes avoid moisture from getting in the scope tube with a system of sealing O-rings which are water resistant.
About Glass Tube Gas Purging
Another element of preventing the buildup of wetness within the rifle optic’s tube is filling the tube with a gas like nitrogen. Since this space is already taken up by the gas, the scope is less affected by condition shifts and pressure distinctions from the outdoor environment which may possibly permit water vapor to leak in around the seals to fill the void which would otherwise be there. These are good qualities of a good rifle scope to seek out.
